Has anyone had severe reactions to Phenergan 25mg Tablets?

I was prescribed Phenergan 25mg Tablets for nausea and vomiting, and I've experienced some of the side effects listed. I've had dizziness, drowsiness and trouble sleeping, but I've also had some other things that aren't listed. I experienced a little hallucination and mood swings. I would like to know if anyone has experienced anything similar, and if so, what did the doctor do. Did anyone experience any of the urgent side effects, and if so, how did you get them to resolve? The drug takes away these symptoms, but I don't want to keep taking it if the side effects are going to be as bad as they are now. I've been taking this medication for 2 days, and I've had these side effects on and off for the same amount of time. Any advice or information would be greatly appreciated!